本文件是ETSI制定的一套标准的一部分，旨在采用模块化结构，涵盖指令2014/53/EU[7]范围内的所有无线电设备。模块化结构如ETSI EG 201 399[i.6]所示。为保护分配给该卫星的频谱，使用给定的地球静止卫星确定用户地面站的参数被视为由卫星运营商或卫星网络运营商负责。选择这些要求是为了确保与其他无线电服务具有足够的兼容性。然而，这些水平不包括可能发生在任何地点但发生概率较低的极端情况。 本文件基于ITU-R第902（WRC-03）号决议[i.1]的应用。本文件可能不包括潜在干扰源正在产生 存在个别重复的瞬态现象或连续现象，例如附近的雷达或广播站点。在这种情况下，可能需要对干扰源或受干扰部分或两者使用特殊保护。本文件不包含有关ESV安装的任何要求、建议或信息。除控制通道外，与接收信息的接收、处理和呈现有关的甲板下装置的所有部分不在本文件的范围内。 控制通道消息的语法不在本文档的范围内。本文件基于《海上导航设备环境条件标准》（IEC EN 60945[4]）。此外，应注意IEC EN 60945[4]第11.1条（噪声和信号）和第11.2条（罗盘安全距离）。

The present document is part of a set of standards developed by ETSI and is designed to fit in a modular structure to cover all radio equipment within the scope of the Directive 2014/53/EU [7]. The modular structure is shown in ETSI EG 201 399 [i.6].The determination of the parameters of the user earth stations using a given geo-stationary satellite for the protection of the spectrum allocated to that satellite, is considered to be under the responsibility of the satellite operator or the satellite network operators.The requirements have been selected to ensure an adequate level of compatibility with other radio services.The levels, however, do not cover extreme cases which may occur in any location but with a low probability of occurrence.The present document is based on the application of ITU-R Resolution 902 (WRC-03) [i.1].The present document may not cover those cases where a potential source of interference which is producing individually repeated transient phenomena or a continuous phenomenon is present, e.g. a radar or broadcast site in the near vicinity. In such a case it may be necessary to use special protection applied to either the source of interference, or the interfered part or both.The present document does not contain any requirement, recommendation or information about the installation of the ESV.All parts of the below-deck unit related to reception, processing and presentation of the received information except the control channel are not within the scope of the present document. The syntax of the control channel messages is outside the scope of the present document.The present document is based upon the standard for environmental conditions for marine navigational equipment, IEC EN 60945 [4]. In addition, attention should be paid to clause 11.1 (Acoustic noise and signals), and clause 11.2 (Compass safe distance) of IEC EN 60945 [4].